What is the normal range for end-tidal CO2 as measured by capnography?
a. 0% to 5%
b. 5% to 6%
c. 6% to 8%
d. 35% to 45%
ANS: B
In healthy individuals, the PETCO2 averages 1 to 5 mm Hg less than the PaCO2, or between 35 and 43 mm Hg (approximately 5% to 6% CO2).
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